ES2191008T3 - Circuito de control automatico de contraste con insercion de supresion vertical. - Google Patents

Circuito de control automatico de contraste con insercion de supresion vertical.

Info

Publication number
ES2191008T3
ES2191008T3 ES93107942T ES93107942T ES2191008T3 ES 2191008 T3 ES2191008 T3 ES 2191008T3 ES 93107942 T ES93107942 T ES 93107942T ES 93107942 T ES93107942 T ES 93107942T ES 2191008 T3 ES2191008 T3 ES 2191008T3
Authority
ES
Spain
Prior art keywords
whitening
feedback circuit
control section
vertical
coupled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES93107942T
Other languages
English (en)
Inventor
Thomas David Gurley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Application granted granted Critical
Publication of ES2191008T3 publication Critical patent/ES2191008T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)
  • Television Receiver Circuits (AREA)

Abstract

UN SISTEMA DE TELEVISION INCLUYE UNA RED DE BLANQUEO SELECTIVAMENTE ACTIVADA PARA INTRODUCIR BLANQUEOS EN EL CIRCUITO DE REALIMENTACION DEL CONTROL AUTOMATICO DE CONTRASTE DURANTE LOS PERIODOS DE BLANQUEO VERTICAL. EL SISTEMA DE TELEVISION INCLUYE UNA SECCION DE CONTROL DE CONTRASTE (13) SENSIBLE A LAS SEÑALES DE COLOR CUYA SALIDA SE ACOPLA A UNA SECCION DE CONTROL DEL BRILLO (15). LAS SALIDAS DE LA SECCION DE CONTROL DE BRILLO SE COMBINAN POR MEDIO DE MEDIOS COMBINATORIOS (47) PARA PRODUCIR UNA SEÑAL COMBINADA REPRESENTATIVA DEL COMPONENTE DE LUMINANCIA DE LA IMAGEN A REPRESENTAR. LA SEÑAL COMBINADA, QUE NO SE BLANQUEA DURANTE EL PERIODO DE BLANQUEO VERTICAL, SE ACOPLA POR MEDIO DE UN CIRCUITO DE REALIMENTACION QUE INCLUYE UN DETECTOR DE PICOS (49) Y UN COMPARADOR (50) CON LA ENTRADA DE LA SECCION DE CONTROL DE CONTRASTE PARA CONTROLAR SU RESPUESTA A LAS SEÑALES DE COLOR. LA RED DE BLANQUEO SELECTIVAMENTE ACTIVADA SE ACOPLA CON LA ENTRADA DEL DETECTOR DE PICOS (40) EN EL CIRCUITO DE REALIMENTACION PARA LIMITAR LA PROPAGACION DE LA SEÑAL COMBINADA POR MEDIO DEL CIRCUITO DE REALIMENTACION DURANTE LOS INTERVALOS DE BLANQUEO VERTICAL.
ES93107942T 1992-05-22 1993-05-15 Circuito de control automatico de contraste con insercion de supresion vertical. Expired - Lifetime ES2191008T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/887,745 US5245434A (en) 1992-05-22 1992-05-22 Autopix circuit with inserted vertical blanking

Publications (1)

Publication Number Publication Date
ES2191008T3 true ES2191008T3 (es) 2003-09-01

Family

ID=25391781

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93107942T Expired - Lifetime ES2191008T3 (es) 1992-05-22 1993-05-15 Circuito de control automatico de contraste con insercion de supresion vertical.

Country Status (9)

Country Link
US (1) US5245434A (es)
EP (1) EP0574711B1 (es)
JP (1) JPH0750791A (es)
KR (1) KR100275226B1 (es)
CN (1) CN1041880C (es)
DE (1) DE69332793T2 (es)
ES (1) ES2191008T3 (es)
MY (1) MY114354A (es)
PT (1) PT574711E (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349390A (en) * 1992-09-22 1994-09-20 U.S. Philips Corporation Picture signal processor for performing both large area and small area contrast reduction, and picture display apparatus incorporating such a picture signal processor
JP3501252B2 (ja) * 1995-06-16 2004-03-02 三菱電機株式会社 階調補正装置
DE19818387A1 (de) * 1997-10-20 1999-04-22 Thomson Brandt Gmbh Verfahren zum Regeln der Bildleistung bei einem Fernsehempfänger
US6437833B1 (en) * 1998-11-18 2002-08-20 Kabushiki Kaisha Toshiba Automatic white balance adjusting circuit in color image display
DE10246120A1 (de) * 2002-10-01 2004-04-22 Deutsche Thomson-Brandt Gmbh Automatische Kontrastregelung mit einer Ausblendung von Störsignalen
JP2009059764A (ja) 2007-08-30 2009-03-19 Panasonic Corp ショットキーバリアダイオードおよびその製造方法
US9874238B2 (en) 2013-04-24 2018-01-23 Shimano Inc. Bicycle end cap
DE102019105823B4 (de) * 2019-03-07 2020-11-19 Tdk Electronics Ag Analog-Digital-Wandler und diesen enthaltende Sensoranordnung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1400427A (en) * 1971-11-08 1975-07-16 Rca Corp Video signal processing apparatus
US4386369A (en) * 1981-09-22 1983-05-31 Rca Corporation Compensated clamping circuit in a video signal peaking system
JPS6043981A (ja) * 1983-08-22 1985-03-08 Sony Corp ビ−ム電流制限回路
US4554578A (en) * 1984-03-02 1985-11-19 Rca Corporation Error compensated control system in a video signal processor
US4937670A (en) * 1989-01-31 1990-06-26 Rca Licensing Corporation Peak detector with feedback
US4947253A (en) * 1989-04-18 1990-08-07 Rca Licensing Corporation Brightness modulator for closed loop compensation of black level
US5134490A (en) * 1989-04-18 1992-07-28 Thomson Consumer Electronics, Inc. Beam current limiter with brightness control threshold extension
US4980756A (en) * 1989-08-25 1990-12-25 Rca Licensing Corporation Control signal generator for a television system
US5003394A (en) * 1989-08-25 1991-03-26 Rca Licensing Corporation Dynamic video system including automatic contrast and "white-stretch" processing sections

Also Published As

Publication number Publication date
KR930024477A (ko) 1993-12-22
PT574711E (pt) 2003-08-29
EP0574711B1 (en) 2003-03-26
CN1082797A (zh) 1994-02-23
MY114354A (en) 2002-10-31
JPH0750791A (ja) 1995-02-21
KR100275226B1 (ko) 2000-12-15
DE69332793D1 (de) 2003-04-30
CN1041880C (zh) 1999-01-27
DE69332793T2 (de) 2003-09-18
US5245434A (en) 1993-09-14
EP0574711A1 (en) 1993-12-22

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